There is a grappleable Powamp directly above each of the 3 peaks.

If carrying a flash suit without Morph, Hi-Jump or Gravity can be used to attach to the center Powamp from the left.

Requires:

"h_navigateUnderwater",
"canUseEnemies",
"Grapple",
{"or": [
  "h_midAirShootUp",
  "HiJump",
  "Gravity"
]}

Clears obstacles: B

Dev note: This strat is only able to bring one crab up without dropping down to 2. Adding a strat to do that is not worth adding, because with grapple, you can bypass the strats that need A.